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首页> 外文会议>International Conference on Healthcare Engineering - Latest Developments and Applications; Nov 25-26, 2003; London, UK >Pressure independent flow control valves
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Pressure independent flow control valves

机译：压力独立流量控制阀

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Much has been written on HEVAC system design, commissioning and component techniques used to offset what occurs in dynamic heating and cooling systems. Dynamics in systems are caused by the operating functions of their own control valves. Selecting and sizing of control valves for full and any part load requirements is now completed by simple reference to manufacturers charts. This does away with the imprecise methods of selection carried out by engineers for what must be one of the most important components used in any heating and cooling systems. This new technology is the first time that a control valve can carry out its primary function of controlling flow, without causing other parts of the system to be effected. The flow dynamics of traditional heating and cooling systems can now be eliminated by using Pressure independent flow control valves. This will enable heating and cooling systems to operate at peak system efficiency not just at design load but for all load conditions. Systems can now be installed using minimum pipework circuitry, saving building space, reducing time for installation and commissioning. This will reduce the capital costs of new and refurbished hospitals and other buildings. Energy and running costs will be minimized whilst temperature and comfort control are maximized. System and sub system performance can be measured at the control valve irrespective of the load passing through the control valve. This maximizes design flexibility on new projects, reduces design risk, in particular when carrying out modifications to existing or refurbishment projects. Central Plant systems can be installed and run at maximum efficiency thus reducing maintenance costs when compared with de-centralized plant systems. On phased installations there is no requirement for rebalancing to earlier phases as new phases come on line thus helping to reduce the disruption to the activities of the hospital or building.
机译：关于HEVAC系统设计，调试和组件技术的很多文章都用来抵消动态加热和冷却系统中发生的事情。系统动态是由其自身控制阀的操作功能引起的。现在，只需参考制造商图表即可完成对控制阀的选择，并确定其满负荷和部分负荷的大小。这就消除了工程师对任何加热和冷却系统中最重要的组件之一进行精确选择的方法。这项新技术是控制阀首次执行其控制流量的主要功能，而又不会影响系统的其他部分。现在，可以通过使用独立于压力的流量控制阀消除传统供暖和制冷系统的流动动力学。这将使加热和冷却系统不仅在设计负载下而且在所有负载条件下都能够以最高系统效率运行。系统现在可以使用最少的管道系统进行安装，从而节省了建筑空间，减少了安装和调试的时间。这将减少新建和翻新医院及其他建筑物的资本成本。能源和运行成本将降到最低，而温度和舒适度控制将最大化。不管通过控制阀的负载如何，都可以在控制阀处测量系统和子系统的性能。这最大程度地提高了新项目的设计灵活性，降低了设计风险，特别是在对现有或翻新项目进行修改时。与分散式工厂系统相比，中央工厂系统可以最大效率地安装和运行，从而降低了维护成本。在分阶段安装中，由于新阶段已上线，因此无需重新平衡到早期阶段，从而有助于减少对医院或建筑物活动的干扰。

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